Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type& `4 M1 V2 P+ [ ~4 x
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
* T% ]5 v1 h1 k' [8 `2 K+ Author Affiliations
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
3 Y6 F# E( U) @ M" u6 V2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan % O N8 E# @! P' Z" h
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan 7 Q. D, D4 L* W9 m) P) I" x2 y
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
8 D, k9 x! u# g6 A5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
- O0 O/ ]0 F0 F: Q7 e8 g. F6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
$ {0 {' i* Y" z. F' [5 U7Kinki University School of Medicine, Osaka 589-8511, Japan " t6 s# ^% E9 Y9 H* ]. a
8Izumi Municipal Hospital, Osaka 594-0071, Japan
% }9 p+ Q8 Y) _- v9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
9 X2 `4 \7 {* d8 i& lCorrespondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp
3 \1 u% O, p9 NAbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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